Congdon, P. (1993). Statistical graduation in local demographic analysis and projection. Journal of the Royal Statistical Society. Series A, 156(2), 237-270. Recuperado de http://www.jstor.org/stable/pdf/2982731.pdf

Gompertz, B. (1825). On the nature of the function expressive of the law of human mortality, and on a new mode of determining the value of life contingencies. Philosophical Transactions of Royal Society of London, 115(1825), 513-583. Recuperado de https://www.medicine.mcgill.ca/epidemiology/hanley/c609/material/Gompertz-1825.pdf

Gompertz, B. (1860). On one uniform law of mortality from birth to extreme old age and on the law of sickness. Journal of the Institute of Actuaries, 16(5), 329-344. Recuperado de https://doi.org/10.1017/S204616740004369X

Gompertz, B. (1862). A supplement to two papers published in the Transactions of the Royal Society, “On the science connected with human mortality;” the one published in 1820, and the other in 1825. Philosophical Transactions of Royal Society (Series A), 152, 511-559. Recuperado de http://rstl.royalsocietypublishing.org/content/152/511.full.pdf+html

Kostaki, A. (1991). The Heligman-Pollard formula as a tool for expanding an abridged life table. Journal of Official Statistics, 7(3), 311-323. Recuperado de http://www.jos.nu/Articles/abstract.asp?article=73311

Makeham, W. (1867). On the law of mortality. Journal of the Institute of Actuaries, 13(6), 325-358. Recuperado de https://doi.org/10.1017/S2046166600003238

Makeham, W. (1889). On the further development of Gompertz’s law. Journal of the Institute of Actuaries, 28(2), 152-159. Recuperado de https://www.jstor.org/stable/41136363?seq=1#page_scan_tab_contents

Thiele, T. (1871). On a mathematical formula to express the rate of mortality throughout the whole of life, tested by a series of observations made use of by the Danish life insurance company of 1871. Journal of the Institute of Actuaries and Assure Magazine, 16(5), 313-329. Recuperado de https://www.jstor.org/stable/41135308?seq=1#page_scan_tab_contents

Whittaker, E. (1923). On a new method of graduation. Proceedings of the Edinburgh Mathematical Society, 41, 63-75. Recuperado de https://www.cambridge.org/core/services/aop-cambridge-core/content/view/744E6CBD93804DA4DF7CAC50507FA7BB/S0013091500077853a.pdf/on_a_new_method_of_graduation.pdf